US3717303A - Method of vacuum-packing insecticidal materials - Google Patents

Method of vacuum-packing insecticidal materials Download PDF

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Publication number
US3717303A
US3717303A US3717303DA US3717303A US 3717303 A US3717303 A US 3717303A US 3717303D A US3717303D A US 3717303DA US 3717303 A US3717303 A US 3717303A
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US
United States
Prior art keywords
bag
pressure
sheet
diffuser
chamber
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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English (en)
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J Daeninckx
R Bouvet
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LOreal SA
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LOreal SA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/26—Articles or materials wholly enclosed in laminated sheets or wrapper blanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
    • B65B31/02—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
    • B65B31/02—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas
    • B65B31/024—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas specially adapted for wrappers or bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/54—Cards, coupons, or other inserts or accessories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/18—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient
    • B65D81/20—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas
    • B65D81/2069—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas in a special atmosphere
    • B65D81/2084—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas in a special atmosphere in a flexible container
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
    • Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics

Definitions

  • ABSTRACT 4 Claims 2 Drawing Figures METHOD OF VACUUM-PACKING INSECTICIDAL MATERIALS SUMMARY OF THE INVENTION pregnate sheets of absorbent material. When these sheets are exposed to the open air they release vapors which are capable of killing insects. The evaporation of the active insecticidal compound is slowed by the presence of the liquid having a high viscosity.
  • the diffusers In order to prevent the insecticidal product from gradually evaporating during storage the diffusers, with their impregnated sheets, have heretofore been enclosed in small air-tight bags such, for example, as bags made of plastic material, and heat sealed.
  • the quantity of air contained in the sealed bag is by no means negligible, because of the thickness of the diffusing box, and the presence of a relatively large volume of oxygen inside the sealed package results in a slow deteriation of the active insecticidal product.
  • the air contained in the bag is slightly humid, hydrolysis of the active product may result, followed by an oxidation which yields acid compounds, such as formic acid.
  • the presence of formic acid which has tear-inducing and irritating properties, becomes immediately apparent when the bag is open.
  • the efficacity of diffusers containing a sheet impregnated with insecticide is greatly reduced as a consequence of this deteriation of the active product.
  • the heat sealing step which is used to close the bag may not be perfectly carried out. This disadvantage is not detectable at the time of manufacture and the incompletely sealed bag will admit air.
  • the active product such as dimethyldichloro-vinylphosphate, is then oxidized, not only by the oxygen originally contained inside the bag, but also by oxygen which thereafter penetrates into the bag, and the decrease in the efiicacity of the insecticidal sheet which results therefrom is very substantial.
  • the present invention is accordingly directed to a method of packaging an insecticidal product, and in particular a sheet impregnated with an insecticide which is to slowly evaporate within a perforated box which acts as a diffuser.
  • This process is essentially characterized by the fact that the perforated box holding the impregnated sheet is positioned inside a bag made of a flexible gas-tight material.
  • This bag is placed in a chamber in which a partial vacuum is induced.
  • An inert gas is then introduced into this chamber to increase the pressure to a value which is still less than atmospheric pressure.
  • the bag containing the diffuser is then sealed and the chamber returned to atmospheric pressure.
  • the bag containing the diffuser with its impregnated sheet is made of a sheet made of plastic material.
  • This sheet of plastic material may be formed of several superposed layers of different plastic materials, the innermost of which is heat-scalable.
  • the sheet from which the bag is made may be from 0.05 mm to 0.5 mm thick.
  • the bag is heat sealed.
  • the pressure inside the chamber is reduced to from 1 to 10 cm of mercury.
  • the inert gas introduced into the chamber is nitrogen.
  • the pressure at which the inert gas is introduced is between 30 and cm of mercury.
  • the inert gas is introduced in such a way as to sweep the chamber and thereby still further reduce the residual quantity of oxygen.
  • the inert gas it is preferable to limit the introduction of the inert gas to a pressure below atmospheric pressure.
  • the pressure difference results in forcing the walls of the bag against the walls of the diffuser. If there is a leak in the bag, an inflow of air results, so that in a very short time the walls of the bag are no longer pressed against the walls of the diffuser. This makes it very easy to detect from the external appearance of the package those bags in which the seal is defective.
  • the pressure during the packaging operation is, in general, sufficient to prevent condensation of the active insecticidal product on the internal surfaces of the walls of the bag, because the saturating vapor tension of the insecticidal product used is generally substantially less than the pressure within the bag.
  • the bag is sealed fluid-tight, and contains a very small quantity of oxygen.
  • the pressure of the gas inside the bag is less than atmospheric pressure.
  • the pressure inside the bag is between 30 and 60 cm of mercury.
  • the residual quantity of oxygen is that which remains in the bag after the pressure therewithin has purely by way of illustration and example, with reference to the accompanying drawing, in which:
  • FIG. 1 is a sectional view taken through a diffuser enclosed in a bag in accordance with the invention.
  • FIG. 2 is a sectional view taken along the line II--ll of FIG. 1.
  • EXAMPLE 1 An insecticidal sheet 2 consisting of a substantially rectangular sheet of cotton and asbestos felt is posi-v tioned inside a diffuser 1 such as the one described in French Pat. application Ser. No. 6902574, filed Feb. 5, 1969. This sheet weighs 9 g and has a surface area of 150 cm. It is impregnated with 35 g of a mixture consisting of:
  • This diffuser is placed inside a bag 3 formed from a sheet consisting of three superposed layers laminated to each other.
  • the first layer 4 comprises a thin film 5 of aluminum foil, a film 6 of cellophane and a film 7 of a plastic material sold under the trademark SARAN.
  • the second layer 8 consists of a film 9 of SARAN, and a film 10'of plastic material sold under the trademark MYLAR," and the third is a layer 11 of polyethylene.
  • the total thickness of the sheet is about 0.1 mm.
  • the polyethylene forms the inner surface of the bag.
  • the foregoing bag 3, holding its diffuser 1, is positioned while open, inside a chamber at atmospheric pressure. A partial vacuum of 4 cm of mercury is produced. Nitrogen is then introduced into this chamber to raise the pressure to 46 cm of mercury. Inside the chamber the bag is then heat sealed by a heating bar, which welds together the polyethylene layers 11- which form the inner surfaces of the bag.
  • EXAMPLE 2 v The said diffuser and the same bag are used as in Example 1.
  • the sheet inside the diffuser is made of the same material having the same area and is impregnated with 35 g of the following mixture:
  • the bag containing the diffuser with its impregnated sheet is subjected to the same packaging process as described in Example 1 and the bag is heat sealed.
  • the product has the same advantages as the one described in Example 1.
  • the efficacity of the insecticidal product does not decrease after long storage.
  • EXAMPLE 3 The said difiuser and bag are used as in Example I.
  • the sheet inside the diffuser is made of the same material as in Example 1 and is of the same size. It is impregnated with 35 g of the following mixture:
  • the bag containing the diffuser with its impregnated sheet is treated in the same way as in Example 1, and the bag is heat sealed.
  • a gas-impervious flexible bag housing a perforated box having a sheet impregnated with an insecticidal material therein, said bag having an inert gas therein of between 30 and 60 cm of mercury, said bag being heatsealed to contain said inert gas therein, the difference in the pressure within the bag and the ambient pressures surrounding the same causing said bag to engage with the walls of the perforated box and to remain in contact with the walls of said perforated box until such time as the pressure within said bag is at least equal to the surrounding atmosphere, whereupon said bag will no longer contact said walls.
  • Bag as claimed in claim 1 which consists of a sheet of plastic material comprising several superposed layers of different plastic materials.
US3717303D 1969-09-26 1970-09-11 Method of vacuum-packing insecticidal materials Expired - Lifetime US3717303A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6932983A FR2058812A5 (de) 1969-09-26 1969-09-26

Publications (1)

Publication Number Publication Date
US3717303A true US3717303A (en) 1973-02-20

Family

ID=9040693

Family Applications (1)

Application Number Title Priority Date Filing Date
US3717303D Expired - Lifetime US3717303A (en) 1969-09-26 1970-09-11 Method of vacuum-packing insecticidal materials

Country Status (7)

Country Link
US (1) US3717303A (de)
BE (1) BE755396A (de)
CA (1) CA933891A (de)
CH (1) CH526265A (de)
DE (1) DE2047168C3 (de)
FR (1) FR2058812A5 (de)
GB (1) GB1279339A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3807082A (en) * 1971-07-16 1974-04-30 Globol Werk Apparatus for killing insects
DE2534074A1 (de) * 1975-07-30 1977-02-17 Wacker Chemitronic Stapelbare paletten-verpackung fuer halbleiterscheiben
US4399911A (en) * 1980-07-23 1983-08-23 Societe Anonyme D'explosifs Et De Produits Chimiques Cartridge for use in anchor bolting
US4558781A (en) * 1980-07-23 1985-12-17 Societe Anonyme D'explosifs Et De Produits Chimiques Cartridge for use in anchor bolting
US5170886A (en) * 1990-05-12 1992-12-15 Firmenich S.A. Plastic multicompartment package for solid and liquid products
US20050154055A1 (en) * 2004-01-14 2005-07-14 Philippe Gouat Method of stabilizing alkylenebisdithiocarbamates
US20060130391A1 (en) * 2004-12-22 2006-06-22 Annette Livingston Repelling rodents

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2086046A (en) * 1933-04-19 1937-07-06 Harry R Schlau Insect destroying means
US2542206A (en) * 1948-01-30 1951-02-20 Corp E F Kemp Art of packaging nuts
US2679969A (en) * 1954-01-12 1954-06-01 Transparent Package Company Package construction
US3027678A (en) * 1957-08-23 1962-04-03 Aerovap Holdings Ltd Pesticides and other volatile compounds
US3214221A (en) * 1961-10-23 1965-10-26 Dk Mfg Company Method of and apparatus for storing and preserving granular material
US3274004A (en) * 1963-05-14 1966-09-20 Curwood Inc Laminated food package
US3343663A (en) * 1965-10-24 1967-09-26 Dow Chemical Co Package and laminate thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2967777A (en) * 1957-10-31 1961-01-10 Paul E Grindrod Method of packaging food products to inhibit growth of molds and bacteria

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2086046A (en) * 1933-04-19 1937-07-06 Harry R Schlau Insect destroying means
US2542206A (en) * 1948-01-30 1951-02-20 Corp E F Kemp Art of packaging nuts
US2679969A (en) * 1954-01-12 1954-06-01 Transparent Package Company Package construction
US3027678A (en) * 1957-08-23 1962-04-03 Aerovap Holdings Ltd Pesticides and other volatile compounds
US3214221A (en) * 1961-10-23 1965-10-26 Dk Mfg Company Method of and apparatus for storing and preserving granular material
US3274004A (en) * 1963-05-14 1966-09-20 Curwood Inc Laminated food package
US3343663A (en) * 1965-10-24 1967-09-26 Dow Chemical Co Package and laminate thereof

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3807082A (en) * 1971-07-16 1974-04-30 Globol Werk Apparatus for killing insects
DE2534074A1 (de) * 1975-07-30 1977-02-17 Wacker Chemitronic Stapelbare paletten-verpackung fuer halbleiterscheiben
US4399911A (en) * 1980-07-23 1983-08-23 Societe Anonyme D'explosifs Et De Produits Chimiques Cartridge for use in anchor bolting
US4558781A (en) * 1980-07-23 1985-12-17 Societe Anonyme D'explosifs Et De Produits Chimiques Cartridge for use in anchor bolting
US5170886A (en) * 1990-05-12 1992-12-15 Firmenich S.A. Plastic multicompartment package for solid and liquid products
US20050154055A1 (en) * 2004-01-14 2005-07-14 Philippe Gouat Method of stabilizing alkylenebisdithiocarbamates
US20060130391A1 (en) * 2004-12-22 2006-06-22 Annette Livingston Repelling rodents
US7380370B2 (en) * 2004-12-22 2008-06-03 Armex, Llc Repelling rodents

Also Published As

Publication number Publication date
CH526265A (fr) 1972-08-15
BE755396A (fr) 1971-03-01
DE2047168C3 (de) 1974-02-07
DE2047168B2 (de) 1973-07-26
GB1279339A (en) 1972-06-28
DE2047168A1 (de) 1971-04-22
CA933891A (en) 1973-09-18
FR2058812A5 (de) 1971-05-28

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